[WebVTT] HTML5 "space" characters around "-->" are not required

Source/core/html/track/WebVTTParser.cpp

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 259 matching lines @@
     // 1-3 - Let input be the string being parsed and position be a pointer into input
     unsigned position = 0;
     skipWhiteSpace(line, &position);
 
     // 4-5 - Collect a WebVTT timestamp. If that fails, then abort and return failure. Otherwise, let cue's text track cue start time be the collected time.
     m_currentStartTime = collectTimeStamp(line, &position);
     if (m_currentStartTime == malformedTime)
         return BadCue;
     if (position >= line.length())
         return BadCue;
-    char nextChar = line[position++];
-    if (nextChar != ' ' && nextChar != '\t')
-        return BadCue;
+
     skipWhiteSpace(line, &position);
 
     // 6-9 - If the next three characters are not "-->", abort and return failure.
     if (line.find("-->", position) == notFound)
         return BadCue;
     position += 3;
     if (position >= line.length())
         return BadCue;
-    nextChar = line[position++];
-    if (nextChar != ' ' && nextChar != '\t')
-        return BadCue;
+
     skipWhiteSpace(line, &position);
 
     // 10-11 - Collect a WebVTT timestamp. If that fails, then abort and return failure. Otherwise, let cue's text track cue end time be the collected time.
     m_currentEndTime = collectTimeStamp(line, &position);
     if (m_currentEndTime == malformedTime)
         return BadCue;
     skipWhiteSpace(line, &position);
 
     // 12 - Parse the WebVTT settings for the cue (conducted in TextTrackCue).
     m_currentSettings = line.substring(position, line.length()-1);
@@ skipping 263 matching lines @@
     unsigned oldPosition = *position;
     while (*position < length && data[*position] != '\r' && data[*position] != '\n')
         (*position)++;
     String line = String::fromUTF8(data + oldPosition, *position - oldPosition);
     skipLineTerminator(data, length, position);
     return line;
 }
 
 }